Grate for destructor-furnaces.



E. H.' Pos-TBR. GRATE FOR DESTRUGTOR'PURNAGES.

APPLICATION FILED JAN.20,1910. y Patented July 1 High @www

WVM/Lewes wf/af COLUMBIA PLANOGRAPH C0,.wAsH|NGToN. D. C.

ERNEST I-I. FOSTER, OF-NEW YORK, N. Y,. ASSIGNOR TO POWER SPECIALTY COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

GRATE FOB, DESTRUCTOR-FURNACES.

Specification of Letters Patent.

Patented July 1, 1913.

Application filed. January 20, 1910. Serial No. 539,103.

T all wir-0m t may concern Be it kno-wn that I, ERNEST H. FOSTER, a citizen of the United States, residing at New York, in the county of Richmond and State of New York, have invented certain new and useful Improvements in Grates for Destructor-Furnaces, of which the following is a full, clean and exact description.

l In the operation of so-called destructor l0 furnaces, for consuming garbage, household refuse, and other waste4 materials, the

Vclinler resulting from the combustion is extremely tough and tenacious, and considerable difficulty 1s experienced in dislodging it from the grates. l

My presentinvention is designed to fa- .cihtate the work of chnkermg, and its chief object is to provide a movable grate,v

with simple and effective means actuating 2o the grate, whereby to dump or discharge the material therefrom into the ash pit below.

To this and other ends the invention which I desire to cover consists in the novel features of construction and combinations of elements hereinafter'described.

A. convenient and effective embodiment of the invention is illustrated in the annexed drawing, in which- Figure 1 shows the movable grate in longitudinal vertical section, with fluid-pressure mechanism for operating the grate. Fig. 2 is a cross section on line 2 2 of Fig. 1. Fig. 3 is a detail perspective view showing the connection between the grate and the piston of the ram or duid-pressure directed flanges l, and connected at their ends to a forward transverse member 5, and to a hollow rear transverse member 6. The former member is beveled inwardly, as shown, and such beveled portion is in alinement with the sloping or inclined front walls 7 of the grate chamber, which is provided with similar walls on its remaining three sides. The hollow grate-bars 8, provided with air-holes or perforations, as Se,

have their forward edges beveled to fit the beveled front member 5 and extend to the rear member 6, being provided at their rear ends with downwardly extending lugs 9 to engage suitable means on the rear member,

as for example a rail or rib 10 carried thereby, said rail being of such height as to cause the bars to lie under the edge of the gratechamber wall, as shown.

Below the side members 3, 3, are two. longitudinal rails 11, 11, extending rearwardly, through an opening 12 in the rear wall of the ash-pit 12a into a closed chamber 13 of suitable construction. These rails are each provided with a series of elongated bearings 14, in which the anti-friction rollers 15 are journaled. The side members 3, 3, of t-he grate-frame, rest on these rollers.

At the rear of the chamber 13 I provide suitable means for retracting and advancing the grate on its rails, as for example a fluidpressure ram 16 mounted firmly on a pier 17.

-The piston 1S of this ram extends through the rear wall of chamber 13, and through a central vertical slot 49 in the rear transverse member 6, to which the piston is connected by nuts 20, 21. These nuts or stops are preferably not set up tightly against the wall of the rear member, but are spaced therefrom suiiiciently to permit free movement of the piston in the slot. The loose connection thus provided enables the parts to accommodate themselves without strain to any inaccuracy in the construction or to such warping of the parts as may occur in use.

From the foregoing description the method of using the apparatus will be readily understood. Vhen the furnace is to be clinkered the fluid-pressure mechanism is started, thereby retracting the sliding grate. As the latter moves to the rearthe mass of clinker is scraped, or sheared off, as it were, by the inclined rear wall of the grate-chamber, and drops into the clinker pit below. lf the clinlrer should not drop at once, but should bridge across the grate-chamber, it can be dislodged by a few blowsof the usual clinkering bar. The actuating mechanism is then reversed and the grate returned to its initial position.

It will thus be seen that the apparatus practically eliminates manual labor in the clinkering operation, and performs the work more rapidly than can be done by hand. At the same time the structure is simple in design, and it willbe observed that the parts of the grate which are in contact with or close to the ire are of a hollow or skeleton construction so as to be cooled by the air rising from the clinker-pit.

The apparatus herein specifically described is convenient and effective for its purpose, but it is to be understood that the invent-ion may be embodied in other forms without departure from its proper spirit and scope.

I claim:

l. A destructor furnace comprising, in combination, a grate, a grate chamber located above and a clinker chamber located below said grate, the horizontal dimensions of said chambers being substantially the same as the horizontal dimensions of said grate said clinker chamber being provided with an opening, and an air tightmetallic casing extending horizontally from the face of the furnace walls to seal the said opening against the entrance of external air and into which the grate may be retracted to discharge the clinker therefrom into the clinker pit.

2. In a destructor furnace, in combination, a clinler pit having an opening in its rear wall, suppo-rting rails at the upper part of the clinker pit and extending through said opening, an air tightmetallic chamber connected to the surrounding walls of and extending rearwardly from said opening and inclosing the rear portion of said rails, a grate slidably mounted on the rails, a power actuated means for retracting the grate through said opening into the air tight chamber, and means coperating with the grate to dislodge clinker therefrom as the grate is retracted into said air tight per part of the clinker pit and extending through said opening, an air tight metallic chamber connected to the surrounding walls of and extending rearwardly from said opening and inclosing the rear portion of said railsa grate-chamber above thevclinler pit having walls extending inwardly over the rails to protect the same, a grate slidably mounted on the rails, a power actuated means for retracting the grate through said opening into the air tight chamber, said inwardly extending walls adapted to coperate with the grate as the latter is retracted into said air tight chamber to dislodge the clinker .therefrom and discharge the same into the clinlzer pit.

4. In a destructor furnace, in combination, a horizontal grate having an end member provided with a vertical slot, a fluidpressure ram having a lpiston loosely engaging the grate in said vertical slot, whereby the relative positions of the partssmay Vary without strain, and means for slidably supporting the grate.

In testimony whereof I aiiix my signature in the presence of two subscribing witnesses.

ERNEST H. FOSTER.

Witnesses:

M. LAWSON Dran, S. S. DUNHAM.

Copies of this patent may be obtained for iive cents each, by addressing the Commissioner of Patents, Washington, 1).,0. 

